The "St. Lawrence Observation Network" application demonstrates the integrated Web access to distributed data sources using Web data services (see detailed descriptions of the sources below). Databases reside within data producing organizations, Web data services contribute to interoperability between their various systems.

The application was originally designed in response to queries from various user groups requesting data about the St. Lawrence as part of their operations and decision making processes. A few examples: search & rescue services needing to adapt their response to temperature and risks of hypothermia, commercial navigation industry calculating vessel water displacement as a function of water physical parameters, mariners planning excursions, acquaculture industry assessing the characteristics of potential sites, grad students working on a thesis, defence scientists studying the performance of underwater sensors, etc.

The observation network will eventually include other parameters and information products requested by users (ex: salinity, currents, etc). It currently offers access to water temperatures:

  • Real-time data as transmitted by scientific (DFO, ISMER) and meteorological (EC) buoys and by the Canadian Hydrographic Service (CHS) network of water level sensors (SINECO);
  • Archive data including data collected over the years by real-time sensors and other type of data collection devices.

Data access: The application, when activated, presents the most recent real-time surface temperatures as obtained from the various sources. Users can also access the archives and select different dates, periods or depth intervals.

NOTE: access to "Real-time" not only offers the most recent data but can also include a certain amount of data collected over the previous months. The transfer of "Real-time" data to the "Archives" databases is done at a frequency that can vary from one source to another. By selecting "Real-time" AND "Archives" for a relatively recent date, users can ensure they find the data they need.

UTC: Universal Time Coordinate. More details at

ODMS-Oceanographic Data Management System:
ISMER: [Temporarily not available]